Originally Posted by itachi-san314
we know that tobi slipping through things is the same technique as him sucking objects into another dimension as confirmed by kakashi which is kamui.
Nope, he said they used the same dimension, and explicitly that they weren't necessarily the same technique. We already know exactly how the two techniques differ. One is centered at the Sharingan and requires physical contact to suck other things in, and the other is long-distance. What effect using the Mangekyou Sharingan has on the close-range version we don't know exactly.